Addition of dust filters causing system temp to rise

[pctech2012]

Hi

Really chuffed with my new system.

However, in my build a few fan vents have been left unused and I am concerned about excess dust penetration into the system, I have the CM Elite 430 case.

Your thread about system you have had back with this problem and indeed my own experiences with regularly having to clear out my old system have prompted me this time to take extra measures to guard against the problem as much as is possible.

With this in mind I purchased three Silverstone 120mm magnetic dust filters and applied them to the top two and one rear vent on the outside of the case.

I booted the system and noticed the cooling fan over the CPU heatsink was running rather quicker than normal as it was quite audible.

I went into the BIOS and noticed it was running about 2100 rpm whereas normally it runs about 1712.

I also noticed the system temp had increased from a steady 35C to 40C.

I removed the filters and the temperature dropped back down.

It would appear that the heat dissipation requires that these are completely open, is that correct or is there an issue?

[skeeteruk]

Not sure what filters you using i mean the type but i was just reading about static pressure for fans which is more important than cfm for fans when trying to get air through something like a radiator or in this case filters? So maybe you need to look at the fans your using and if the static pressure is sufficient instead of relying on CFM values due to the filters?

[Jonj1611]

Any filter will increase the temp inside the machine, while they may filter out dust they are still acting as an insulator. For instance some people who want better cooling remove the filters, I have done so in one of my cases, you will notice in time that as the filter collects dust the temps will rise a bit further for obvious reasons.

[technodean]

How many fans do you have blowing air in and how many do you have blowing air out? Are you still using the oem cpu cooler?